985783 has 2 divisors, whose sum is σ = 985784. Its totient is φ = 985782.

The previous prime is 985781. The next prime is 985799. The reversal of 985783 is 387589.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 985783 - 2¹ = 985781 is a prime.

Together with 985781, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492891 + 492892.

It is an arithmetic number, because the mean of its divisors is an integer number (492892).

2⁹⁸⁵⁷⁸³ is an apocalyptic number.

985783 is a deficient number, since it is larger than the sum of its proper divisors (1).

985783 is an equidigital number, since it uses as much as digits as its factorization.

985783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 985783 is about 992.8660534030. The cubic root of 985783 is about 99.5238362798.

The spelling of 985783 in words is "nine hundred eighty-five thousand, seven hundred eighty-three".